CN110832800B

CN110832800B - Method and device for HARQ feedback enhancement, communication equipment and storage medium

Info

Publication number: CN110832800B
Application number: CN201980001670.6A
Authority: CN
Inventors: 朱亚军; 洪伟; 李俊丽; 李勇
Original assignee: Beijing University of Posts and Telecommunications; Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing University of Posts and Telecommunications; Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2022-07-01
Anticipated expiration: 2039-08-07
Also published as: CN110832800A; WO2021022517A1; US20220294568A1

Abstract

The disclosure relates to a method and apparatus for HARQ feedback enhancement, a communication device and a storage medium. A method of HARQ feedback enhancement, wherein the method comprises: sending downlink control information containing first indication information to a terminal; the first indication information is used for indicating the number of downlink transport blocks received by the terminal in a subframe after a current subframe and a subcarrier after the current subcarrier in a current HARQ feedback window.

Description

Method and device for HARQ feedback enhancement, communication equipment and storage medium

Technical Field

The present disclosure relates to the field of wireless communications technologies, but not limited to the field of wireless communications technologies, and in particular, to a method and an apparatus for enhancing Hybrid Automatic Repeat request (HARQ) feedback, a communication device, and a storage medium.

Background

On one hand, the increase of mobile equipment and the rapid development of mobile internet bring about the explosive increase of mobile data, and put higher requirements on performances such as traffic density, network capacity, user rate, time delay and the like. In order to meet the challenge, a New air interface (NR) of the fifth generation (5G, 5th generation) mobile communication is designed for a New scene and a New frequency band. On the other hand, the shortage of spectrum resources is an increasingly severe reality facing mobile communication networks. Licensed band resources, especially the more valuable low band resources, are not only bandwidth limited, but are also being consumed rapidly by an increasing pool of terminals. To cope with the challenge of spectrum shortage and increase of system capacity, a research plan for NR-Based Unlicensed band (NR-U) has been proposed and a research project has been opened.

NR-based unlicensed band NR-U Access and Assisted licensed Access (LAA) correspond to two network technologies using an NR air interface and a Long Term Evolution (LTE) air interface in an unlicensed band, respectively. Although the unlicensed band has rich bandwidth resources, in order to ensure fair coexistence between different Radio Access Technologies (RATs) using this band, a Listen Before Talk (LBT) technique based on CCA (Clear Channel assignment) is introduced into LAA. The introduction of the LBT technology into the NR-based unlicensed band is an important way to ensure fair coexistence. In the NR system, the probability of missed detection of a Physical Downlink Control Channel/Physical Uplink Control Channel (PDCCH/PUCCH) is very low, and is basically negligible for the case of continuously missing 4 PDCCHs. However, in the NR-U system, due to the introduction of the LBT mechanism, the hidden node problem brought by the LBT mechanism may cause uplink (UL, Up Link) LBT failure, so that the probability of PDCCH/PUCCH missed detection is increased, the number of consecutive lost PDCCHs is more, downlink HARQ feedback transmission fails, and finally, the HARQ feedback failure of the user is caused.

For the above situation, in order to provide multiple transmission opportunities for HARQ, a protocol is formulated that supports a base station to trigger HARQ feedback for a Physical Downlink Shared Channel (PDSCH) in a last Channel Occupancy Time (COT) period or a last HARQ feedback window. However, in the implementation process of the technical solution adopted in the protocol, the problem that the feedback content of HARQ feedback between the base station (gNB) and the User Equipment (UE) is ambiguous arises.

Disclosure of Invention

To overcome the problems in the related art, the present disclosure provides a method and apparatus for HARQ feedback enhancement, a communication device, and a storage medium.

According to a first aspect of embodiments of the present disclosure, a method for HARQ feedback enhancement is provided, where the method includes:

sending downlink control information containing first indication information to a terminal; the first indication information is used for indicating the number of downlink transport blocks received by the terminal in a subframe after a current subframe and a subcarrier after the current subcarrier in a current HARQ feedback window.

In an embodiment, the method further comprises:

the downlink control information also comprises second indication information; the second indication information is used for indicating the terminal to send the HARQ feedback of the first transport block and/or the HARQ feedback of the second transport block; wherein the first transport block is a transport block decoded by a first codebook currently used; the second transport block is a transport block decoded by a second codebook used before the first codebook.

In an embodiment, the method further comprises:

when the previously received HARQ feedback of the second transport block is successfully received, the second indication information has a first indication value, and the first indication value is used for indicating the terminal to send the HARQ feedback of the first transport block;

when the previously received HARQ feedback of the second transport block fails to be received, the second indication information has a second indication value, and the second indication value is used for indicating the terminal to send the HARQ feedback of the first transport block and the second transport block.

In an embodiment, the method further comprises:

and the numerical information determined by the bit number occupied by the second indication information is used for indicating the number of the second transport blocks for performing HARQ feedback when the terminal sends the HARQ feedback of the first transport block and the HARQ feedback of the second transport blocks.

In an embodiment, the method further comprises:

and setting the third indication information as a counting mode among HARQ feedback windows, wherein when HARQ feedback of the second transmission block received in advance fails to be received, the counting mode among the HARQ feedback windows is a continuous counting mode, the third indication information is used for indicating that the number of downlink transmission blocks received by the terminal is in the HARQ feedback windows, on a subframe before the current subframe and a subcarrier before the current subcarrier and the current subcarrier.

According to a second aspect of the embodiments of the present disclosure, there is also provided a method for HARQ feedback enhancement, wherein the method includes:

receiving downlink control information containing first indication information;

and determining the number of the received downlink transmission blocks in the current HARQ feedback window and on the sub-frame and the sub-carrier after the current sub-frame according to the first indication information.

In an embodiment, the downlink control information further includes second indication information; the method further comprises the following steps:

sending HARQ feedback of the first transport block and/or HARQ feedback of the second transport block according to the second indication information; wherein the first transport block is a transport block decoded by a first codebook currently used; the second transport block is a transport block decoded by a second codebook used before the first codebook.

In an embodiment, the method further comprises:

and determining the number of the second transport blocks for HARQ feedback when the HARQ feedback of the first transport block and the HARQ feedback of the second transport blocks are sent according to the numerical information determined by the bit number occupied by the second indication information.

In an embodiment, the downlink control information further includes third indication information, and the method further includes: when the second indication information indicates that HARQ feedback of a first transmission block and HARQ feedback of a second transmission block are sent, determining that the third indication information is a continuous counting mode between HARQ feedback windows; the third indication information is used for indicating that the terminal receives the number of downlink transmission blocks in a continuous HARQ feedback window on a current subframe and a subframe before the current subframe and a subcarrier before the current subcarrier; and determining the feedback content of HARQ feedback according to the first indication information and the third indication information.

According to a third aspect of the embodiments of the present disclosure, an apparatus for HARQ feedback enhancement is further provided, where the apparatus includes a sending module, where the sending module is configured to send downlink control information including first indication information to a terminal; the first indication information is used to indicate the number of downlink transport blocks received by the terminal in a subframe after a current subframe and a subcarrier after the current subcarrier within a current HARQ feedback window.

In an embodiment, the sending module is further configured to configure the downlink control information to further include second indication information; the second indication information is used for indicating the terminal to send the HARQ feedback of the first transport block and/or the HARQ feedback of the second transport block; wherein the first transport block is a transport block decoded by a first codebook currently used; the second transport block is a second codebook decoded transport block used before the first codebook.

In an embodiment, the sending module is further configured to, when the previously received HARQ feedback of the second transport block is successfully received, indicate the second indication information to have a first indication value, where the first indication value is used to indicate the terminal to send the HARQ feedback of the first transport block; when the previously received HARQ feedback of the second transport block fails to be received, the second indication information has a second indication value, and the second indication value is used for indicating the terminal to send the HARQ feedback of the first transport block and the second transport block.

In an embodiment, the sending module is further configured to configure numerical information determined by the number of bits occupied by the second indication information, where the numerical information is used to indicate that the terminal determines the number of the second transport blocks performing HARQ feedback when sending the HARQ feedback of the first transport block and the HARQ feedback of the second transport block.

In an embodiment, the downlink control information includes third indication information, the sending module is further configured to set the third indication information as a counting mode between HARQ feedback windows, where the counting mode between HARQ feedback windows is a continuous counting mode when HARQ feedback of the second transport block received in advance fails to be received, and the third indication information is used to indicate that the number of downlink transport blocks received by the terminal is within the HARQ feedback window on a subframe before the current subframe and on a subcarrier before the current subcarrier and the current subcarrier.

According to a fourth aspect of the embodiments of the present disclosure, there is further provided an apparatus for HARQ feedback enhancement, where the apparatus includes a receiving module, where the receiving module is configured to receive downlink control information including first indication information; and determining the number of the received downlink transmission blocks in a subframe after the current subframe and a subcarrier after the current subcarrier in the current HARQ feedback window according to the first indication information.

In an embodiment, the downlink control information further includes second indication information, and the receiving module is further configured to send HARQ feedback of the first transport block and/or HARQ feedback of the second transport block according to the second indication information; wherein the first transport block is a transport block decoded by a first codebook currently used; the second transport block is a transport block decoded by a second codebook used before the first codebook.

In an embodiment, the receiving module is further configured to determine, according to numerical information determined by the number of bits occupied by the second indication information, the number of the second transport blocks performing HARQ feedback when transmitting HARQ feedback of the first transport block and HARQ feedback of the second transport block.

In an embodiment, the downlink control information further includes third indication information, and the receiving module is further configured to determine that the third indication information is a continuous counting mode between HARQ feedback windows when the second indication information indicates that HARQ feedback of a first transport block and HARQ feedback of a second transport block are sent; the third indication information is used for indicating that the terminal receives the number of downlink transmission blocks in a continuous HARQ feedback window on a current subframe and a subframe before the current subframe and on a current subcarrier and a subcarrier before the current subcarrier; and determining the feedback content of HARQ feedback according to the first indication information and the third indication information.

According to a fifth aspect of embodiments of the present disclosure, there is provided a communication apparatus including:

an antenna;

a memory;

and the processor is respectively connected with the antenna and the memory, and is used for controlling the antenna to receive and transmit wireless signals by executing the executable program stored in the memory, and can execute the steps of the method for enhancing the HARQ feedback provided by any technical scheme.

According to a sixth aspect of embodiments of the present disclosure, there is provided a non-transitory computer-readable storage medium storing an executable program, wherein the executable program when executed by a processor implements the steps of the method for HARQ feedback enhancement provided by any of the foregoing technical solutions.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the terminal can determine the number of downlink transmission blocks which need to be received by the terminal in a current hybrid automatic repeat request HARQ feedback window on a subframe after the current subframe and a subcarrier after the current subcarrier according to the first indication information. The terminal obtains the number of the downlink transmission blocks which need to be received, and the terminal can determine whether each downlink transmission block sent by the base station is lost or not according to the number of the downlink transmission blocks which need to be received and the information of the downlink transmission blocks which are actually received by the terminal, so that the problem that the feedback content is unclear when the terminal carries out HARQ feedback due to the fact that the number of the downlink transmission blocks sent by the base station is unknown is solved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic structural diagram of a wireless communication system according to an embodiment of the present disclosure;

fig. 2 is a schematic diagram of a HARQ feedback scenario provided in an embodiment of the present disclosure;

fig. 3 is a schematic diagram of a HARQ feedback scenario according to another embodiment of the present disclosure;

fig. 4 is a schematic diagram of a HARQ feedback scenario according to another embodiment of the present disclosure;

fig. 5a is a schematic diagram of a HARQ feedback scenario according to another embodiment of the present disclosure;

fig. 5b is a schematic diagram of a HARQ feedback scenario according to another embodiment of the present disclosure;

fig. 5c is a schematic diagram of a HARQ feedback scenario according to another embodiment of the present disclosure;

fig. 6 is a schematic diagram of a HARQ feedback scenario according to another embodiment of the present disclosure;

fig. 7a is a schematic diagram of a HARQ feedback scenario according to another embodiment of the present disclosure;

fig. 7b is a schematic diagram of a HARQ feedback scenario according to another embodiment of the present disclosure;

fig. 7c is a schematic diagram of a HARQ feedback scenario according to another embodiment of the present disclosure;

fig. 8 is a diagram illustrating a method for HARQ feedback enhancement according to an embodiment of the present disclosure;

fig. 9 is a schematic diagram of a method for HARQ feedback enhancement according to another embodiment of the present disclosure;

fig. 10 is a schematic diagram of a HARQ feedback scenario provided in an embodiment of the present disclosure;

fig. 11a is a schematic diagram of a HARQ feedback scenario according to another embodiment of the present disclosure;

fig. 11b is a schematic diagram of a HARQ feedback scenario according to another embodiment of the present disclosure;

fig. 11c is a schematic diagram of a HARQ feedback scenario according to another embodiment of the present disclosure;

fig. 12 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure;

fig. 13 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the examples of the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the embodiments of the application, as detailed in the appended claims.

The terminology used in the embodiments of the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present disclosure. As used in the disclosed embodiments and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information in the embodiments of the present disclosure, such information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of embodiments of the present disclosure. The words "if" and "if" as used herein may be interpreted as "at … …" or "at … …" or "in response to a determination", depending on the context.

Referring to fig. 1, a schematic structural diagram of a wireless communication system according to an embodiment of the present disclosure is shown. As shown in fig. 1, the wireless communication system is a communication system based on a cellular mobile communication technology, and may include: several terminals 11 and several base stations 12.

Terminal 11 may refer to, among other things, a device that provides voice and/or data connectivity to a user. The terminal 11 may communicate with one or more core networks via a Radio Access Network (RAN), and the terminal 11 may be an internet of things terminal, such as a sensor device, a mobile phone (or referred to as a "cellular" phone), and a computer having the internet of things terminal, and may be a fixed, portable, pocket, handheld, computer-included, or vehicle-mounted device, for example. For example, a Station (STA), a subscriber unit (subscriber unit), a subscriber Station (subscriber Station), a mobile Station (mobile), a remote Station (remote Station), an access point (ap), a remote terminal (remote terminal), an access terminal (access terminal), a user equipment (user terminal), a user agent (user agent), a user equipment (user device), or a user terminal (UE). Alternatively, the terminal 11 may be a device of an unmanned aerial vehicle. Alternatively, the terminal 11 may also be a vehicle-mounted device, for example, a vehicle computer with a wireless communication function, or a wireless communication device externally connected to the vehicle computer. Alternatively, the terminal 11 may be a roadside device, for example, a street lamp, a signal lamp or other roadside device with a wireless communication function.

The base station 12 may be a network side device in a wireless communication system. The wireless communication system may be a 4th generation mobile communication (4G) system, which is also called a Long Term Evolution (LTE) system; alternatively, the wireless communication system can be a 5G system, which is also called a New Radio (NR) system or a 5G NR system. Alternatively, the wireless communication system may be a further next generation system of a 5G system. Among them, the Access Network in the 5G system may be referred to as NG-RAN (New Generation-Radio Access Network, New Generation Radio Access Network). Alternatively, an MTC system.

The base station 12 may be an evolved node b (eNB) used in a 4G system. Alternatively, the base station 12 may be a base station (gNB) adopting a centralized distributed architecture in the 5G system. When the base station 12 adopts a centralized distributed architecture, it generally includes a Centralized Unit (CU) and at least two Distributed Units (DU). A Packet Data Convergence Protocol (PDCP) layer, a Radio Link layer Control Protocol (RLC) layer, and a Media Access Control (MAC) layer are set in the centralized unit; a Physical (PHY) layer protocol stack is disposed in the distribution unit, and the embodiment of the present disclosure does not limit the specific implementation manner of the base station 12.

The base station 12 and the terminal 11 may establish a wireless connection over a wireless air interface. In various embodiments, the wireless air interface is based on a fourth generation mobile communication network technology (4G) standard; or the wireless air interface is a wireless air interface based on a fifth generation mobile communication network technology (5G) standard, for example, the wireless air interface is a new air interface; alternatively, the wireless air interface may be a wireless air interface based on a 5G next generation mobile communication network technology standard.

In some embodiments, an E2E (End to End) connection may also be established between terminals 11. Scenarios such as V2V (vehicle to vehicle) communication, V2I (vehicle to Infrastructure) communication, and V2P (vehicle to vehicle) communication in vehicle networking communication (V2X).

In some embodiments, the wireless communication system may further include a network management device 13.

Several base stations 12 are connected to a network management device 13, respectively. The network Management device 13 may be a Core network device in a wireless communication system, for example, the network Management device 13 may be a Mobility Management Entity (MME) in an Evolved Packet Core (EPC). Alternatively, the Network management device may also be other core Network devices, such as a Serving GateWay (SGW), a Public Data Network GateWay (PGW), a Policy and Charging Rules Function (PCRF), a Home Subscriber Network side device (HSS), or the like. The implementation form of the network management device 13 is not limited in the embodiment of the present disclosure.

For better understanding of a method of HARQ feedback enhancement provided by an embodiment of the present disclosure. First, a description is given of a related art scheme.

As shown in fig. 2, an embodiment of the present disclosure provides a HARQ feedback scenario. In the HARQ feedback scenario, a count-Downlink assignment index (C-DAI) sent by the base station is used to indicate the number of Downlink transport blocks that the terminal can receive in a current HARQ feedback window (here, the HARQ feedback window corresponds to the same feedback resource, which may also be referred to as the same codebook), on a subframe before the current subframe and on a subcarrier before the current subcarrier and the current subframe. A Total-Downlink assignment index (T-DAI) is used to indicate the number of Downlink transport blocks that can be received for the terminal on all subcarriers until the current subframe within the current HARQ feedback window. Here, the C-DAI may be understood as indicating how many downlink data may be received for the terminal by the current subframe and the current subcarrier within the current HARQ feedback window.

For the HARQ feedback triggered by the base station, in order to indicate the unacknowledged downlink transport block, it is proposed that the DAI bits should be extended and consecutive counting of DAIs between different HARQ feedback windows should be allowed. Referring to fig. 2, since all downlink transport blocks corresponding to codebook 2 are lost to cause HARQ feedback failure (corresponding to reference numeral @inthe figure), the base station employs a continuous DAI mechanism and triggers the terminal to feed back the data receiving condition of codebook 2 together with codebook 3. When a terminal receives a codebook 3 issued by a base station, the terminal knows that NNN (N is short for NACK indicator NACK and is used for representing the state of receiving a corresponding transmission block after NAK is received and A is short for ACK indicator ACK and is used for representing the state of receiving the corresponding transmission block) needs to be fed back before a downlink transmission block 6 according to the indication that C-DAI is 4, and the NNN and AA of newly received data are fed back in a feedback resource indicated by the codebook 3 together, wherein the corresponding HARQ feedback content is NNNAA.

However, the ambiguity of the HARQ feedback codebook between the base station gNB and the terminal UE may arise due to the introduction of the base station triggered HARQ feedback mechanism and allowing the use of consecutive DAI counts for the accumulated downlink transport blocks. As shown in fig. 3, since part of the downlink transport blocks of codebook 2 are lost and HARQ feedback thereof fails (corresponding to symbol @inthe figure), the base station employs a continuous DAI mechanism and triggers the user to feedback the data reception condition of codebook 2 together with codebook 3. When receiving codebook 3 from the base station, the terminal may mistakenly feed back NNNAA (corresponding to symbol (C) in the figure) by considering that 3 transmission blocks transmitted first are lost in codebook 2 according to the indication that C-DAI is 4. And the content of the HARQ feedback expected by the base station should be AANAA, so that the ambiguity of the HARQ feedback codebook between the base station and the terminal occurs.

As shown in fig. 4, another embodiment of the present disclosure provides a HARQ feedback scenario. In the HARQ feedback scenario, two indications, namely a new Codebook index (CI, Codebook index) and a Codebook set indication (Reported Codebook set indication), are added to the NR-U DCI. The CI is used for indicating a group of transmission blocks corresponding to the same feedback resource and occupying 2 bits; the Reported Codebook set indication is used for indicating the number of transport block sets needing to be fed back, occupies 2 bits, and indicates that only the HARQ in the current Codebook is fed back when the value of the transmitted block set indication is 1, and indicates that the HARQ of the current Codebook and the HARQ of the previous Codebook are fed back together when the value of the transmitted block set indication is more than 1.

As shown in fig. 4, since a part of downlink transport blocks of Codebook 2 is lost and HARQ feedback thereof fails (corresponding to reference numeral @inthe figure), the base station sets the Reported Codebook set indication of Codebook 3 to 2 to trigger the terminal to feed back the data reception condition of Codebook 2 together with Codebook 3. When receiving the Codebook 3 transmitted by the base station, the terminal indicates that the HARQ feedback of the Codebook 2 fails according to the C-DAI-4 and the Reported Codebook set indication-2. And transmitting the HARQ feedbacks corresponding to the codebooks 2 and 3 in the feedback resource indicated by the codebook 3 together, wherein the HARQ feedback content is AANAA.

Although the scheme can reduce the ambiguity problem of the HARQ codebook in the HARQ feedback retransmission scene triggered by the failure of the base station to detect the uplink connection 2(UL 2). However, if a previous HARQ codebook retransmission is triggered in the middle of the current HARQ codebook, a problem of erroneous HARQ feedback of the terminal may occur. As shown in fig. 5a, 5b, and 5c, since the feedback of the uplink connection 1(UL1) fails, the base station sets the Reported Codebook set indication of Codebook 2 to 2, and triggers the terminal to feed back the data reception status of Codebook 1 together with Codebook 2. But the scheme triggers the same retransmission indication in these three scenarios. When the user receives the Codebook 2 issued by the base station, the user can not correctly judge the number of HARQ bits to be fed back and the corresponding content in each Codebook only according to the indication that C-DAI is 5 and the Reported Codebook set indication is 2. For example, the base station sends the downlink transport blocks in the scenario of fig. 5a, but since the terminal cannot correctly determine the number of transport blocks corresponding to each HARQ codebook and the feedback content, the content that the terminal may feed back is ananaaa (fig. 5b) or anaaa (fig. 5c), and the content that the terminal should actually feed back is AANNAA, a situation that the terminal feeds back HARQ erroneously occurs, thereby causing a problem that the HARQ feedback codebook between the base station and the terminal is ambiguous.

As shown in fig. 6, another embodiment of the present disclosure provides a HARQ feedback scenario. In the HARQ feedback scenario, two indications, i.e., downlink transport block Set Identification information (S _ ID) and level bitmap Set level bitmap, are newly added to the NR-U DCI. The S _ ID is used for indicating a group of downlink transmission blocks corresponding to the same feedback resource and occupies 2 bits; and the set level bitmap is used for indicating which HARQ feedback of the S _ ID needs to be fed back, is in one-to-one correspondence with the S _ ID number, and when the bit position of the S _ ID is 1, indicates that the HARQ content of the corresponding S _ ID is fed back and occupies 4 bits. Referring to fig. 6, since a part of downlink transport blocks of codebook 2 are lost and HARQ feedback fails (corresponding to ±) in the figure, the base station sets a set level bitmap of codebook 3 to 0110, and triggers the terminal to feed back the data receiving condition of codebook 2(0010) and codebook 3(0100) together. When receiving codebook 3 issued by the base station, the terminal indicates that the HARQ feedback of codebook 2 is known to fail according to C-DAI 4 and set level bitmap 0110, and transmits the HARQ feedbacks corresponding to codebooks 2 and 3 together in the feedback resource indicated by codebook 3, wherein the HARQ feedback content is AANAA.

Although the technical scheme can reduce the problem that the base station fails to detect the HARQ codebook uncertainty in the UL2 trigger HARQ feedback retransmission scene. However, if a previous HARQ codebook retransmission is triggered in the middle of the current HARQ codebook, a problem of the UE erroneously feeding back HARQ may occur. As shown in fig. 7a, 7b, and 7c, due to the feedback failure of UL1, the base station sets a set level bitmap of codebook 2 to 0011, and triggers the terminal to feed back the data reception condition of codebook 1 together with codebook 2. However, the same retransmission indication may be triggered in these three scenarios, and when the terminal has received the codebook 2 issued by the base station, the terminal cannot correctly determine the number of HARQ bits to be fed back and the corresponding feedback content in each codebook only according to the indication that the C-DAI is 5 and the set level bitmap is 0011. For example, the base station sends the downlink transport block in the scenario of fig. 7a, and since the terminal cannot correctly determine the corresponding number and content of each HARQ codebook, the content that may be fed back is ananaaa (corresponding to fig. 7b) or anaaa (corresponding to fig. 7 c). However, the content that should be fed back is AANNAA, so that the HARQ feedback error occurs at the terminal, and further, the HARQ feedback codebook between the base station and the terminal is uncertain.

As shown in fig. 8, an embodiment of the present disclosure provides a method for HARQ feedback enhancement, including:

step S110: sending downlink control information containing first indication information to a terminal; the first indication information is used for indicating the number of downlink transport blocks received by the terminal in a subframe after the current subframe and a subcarrier after the current subcarrier in a current HARQ feedback window.

Here, the first indication information may be understood as indicating how many downlink data are required to be received on the following sub-frame and all following sub-carriers up to the current sub-frame and the current sub-carrier within the current HARQ feedback window. Here, the data receiving end determines whether to correctly receive data when data transmission is performed based on hybrid automatic repeat request HARQ feedback of a transport block. When the data is correctly received, feeding back ACK; when the data is not correctly received, NACK is fed back. Here, the ACK/NACK is transmitted on a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH). Here, in the time division duplex system, a downlink shared physical channel transmitting a plurality of downlink subframes may feed back ACK or NACK through the same uplink subframe. All downlink subframes corresponding to the same uplink subframe form a set K, and all downlink subframes in the set K are collectively referred to as an HARQ feedback window. Here, the terminal may determine whether each downlink transport block sent by the base station is lost according to the number of downlink transport blocks that need to be received and according to the information of the downlink transport blocks that have been actually received by itself, for example, the base station sends 6 transport blocks, which are transport block 1, transport block 2, transport block 3, transport block 4, transport block 5, and transport block 6. The field values included by the corresponding first indication information are 5, 4, 3, 2, 1 and 0 respectively, and the transport block 2 and the transport block 5 are lost in the transmission process, so that the terminal can determine that the transport block 2 and the transport block 5 are lost according to the information of the transport block 1, the transport block 3, the transport block 4 and the transport block 6 actually and sequentially received by the terminal and by combining the field values corresponding to the first indication information corresponding to the transport block 1, the transport block 3, the transport block 4 and the transport block 6. And feeding back the receiving and losing results of the downlink transmission block to the base station in a HARQ feedback mode so that the base station can determine whether to send the downlink transmission block to the terminal again or send a new downlink transmission block to the terminal.

For example, the base station sends 3 downlink transport blocks, i.e. transport block 1, transport block 2, and transport block 3, to the terminal in the first HARQ feedback window. When the terminal successfully receives the transmission block 1 and the transmission block 2, the first indication information indicated by the transmission block 2 indicates that 1 transmission block needs to be received. But the transport block 3 is lost in the transmission process, and when the terminal confirms that only 2 transport blocks are received in the first HARQ feedback window, that is, only the transport block 1 and the transport block 2 are received, it can be known that the transport block 3 is lost according to the first indication information. And feeding back the receiving and losing results of the downlink transmission block in the first HARQ feedback window to the base station in an HARQ feedback mode so that the base station can determine to send the downlink transmission block 3 to the terminal again.

Here, the downlink transport block may refer to downlink data transmitted through a certain downlink shared physical channel. Here, on a sub-carrier following a sub-frame and a current sub-carrier following a current sub-frame may refer to on a sub-carrier following a sub-frame and a current sub-carrier following a current sub-frame that is higher in frequency. Referring to fig. 3 again, taking the transmission block 3, the transmission block 4, and the transmission block 5 corresponding to the codebook 2 in fig. 3 as an example, when the currently received transmission block is the transmission block 3, the transmission block 4 and the transmission block 5 are transmission blocks that the terminal needs to receive on a sub-carrier that is a sub-frame after the current sub-frame and has a higher frequency after the current sub-carrier relative to the transmission block 3. Here, the carrier frequencies corresponding to the transport blocks 4 and 5 are greater than the carrier frequency corresponding to the transport block 3.

In the embodiment of the disclosure, the terminal can determine, according to the first indication information, the number of downlink transport blocks received by the terminal in a feedback window of a current hybrid automatic repeat request HARQ on a subframe after the current subframe and a subcarrier after the current subcarrier. The terminal obtains the number of the downlink transmission blocks which need to be received, and then the terminal determines whether each downlink transmission block sent by the base station is lost or not according to the number of the downlink transmission blocks which need to be received and the information of the received downlink transmission blocks, so that the problem that the feedback content is not clear when the HARQ feedback is carried out due to the fact that the terminal does not know the number of the downlink transmission blocks sent by the base station is solved.

In an embodiment, in step S110, the downlink control information further includes second indication information; the second indication information is used for indicating the terminal to send the HARQ feedback of the first transport block and/or the HARQ feedback of the second transport block; wherein the first transmission block is a transmission block decoded by a first codebook currently used; the second transport block is a transport block decoded by a second codebook used before the first codebook.

Here, the codebook corresponds to the HARQ feedback window. For example, the second transport block includes transport block 1, transport block 2, and transport block 3 within a second HARQ feedback window, where the second HARQ feedback window corresponds to a second codebook through which transport block 1, transport block 2, and transport block 3 are decoded, respectively. Within the first HARQ feedback window, the first transport block includes transport block 3, transport block 4, and transport block 5, where the first HARQ feedback window corresponds to a first codebook through which transport block 3, transport block 4, and transport block 5 are decoded, respectively. If the HARQ feedback corresponding to the transport block 1, the transport block 2, and the transport block 3 included in the second transport block is AAN, where the AAN is used to characterize that the HARQ feedback contents corresponding to the transport block 1, the transport block 2, and the transport block 3 are ACK, and NACK, respectively, that is, the transport block 1 and the transport block 2 are successfully received, and the transport block 3 is lost. If the HARQ feedback corresponding to the transport block 3, the transport block 4, and the transport block 5 included in the first transport block is AAA, where the AAA is used to characterize that the HARQ feedback contents corresponding to the transport block 1, the transport block 2, and the transport block 3 are ACK, and ACK, respectively, that is, the transport block 1, the transport block 2, and the transport block 3 are all successfully received. When the second indication information indicates that the terminal sends the HARQ feedback of the first transport block and the HARQ feedback of the second transport block, the corresponding HARQ feedback content is AANAAA.

Here, when the second indication information indicates that the terminal sends the HARQ feedback of the first transport block, the corresponding HARQ feedback content is AAA. Here, the second transport block may be a plurality of transport blocks, for example, the first transport block is the nth transport block, and the second transport block may be the N-1 st, N-2 nd, N-3 rd transport block, and the like, and the second transport block may also be a plurality of transport blocks in the N-1 st, N-2 nd, N-3 rd, and the like, for example, the N-1 st and N-2 nd. In this embodiment, the HARQ feedback performed by multiple transport blocks together can save transmission resources.

In an embodiment, when the second indication information has the first indication value, the terminal is instructed to send HARQ feedback of the first transport block; and when the second indication information has a second indication value, the terminal is instructed to send the HARQ feedback of the first transport block and the HARQ feedback of the second transport block.

Here, the first indication value may be a value corresponding to a certain field in the second indication information, for example, if the second indication information includes a field XXX01XX, 01 in the field is the first indication value, and is used to determine HARQ feedback for transmitting the first transport block. For another example, the second indication information includes a field XXX10XX, where 10 in the field is a first indication value, and is used to determine to send the HARQ feedback of the first transport block and the HARQ feedback of the second transport block. Here, transmitting the HARQ feedback of the first transport block may refer to performing HARQ feedback only for the reception situation of the transport block in the current HARQ feedback window. Transmitting the HARQ feedback of the first transport block and the HARQ feedback of the second transport block may refer to performing HARQ feedback on the reception results of the transport blocks in the other HARQ feedback windows together with the reception results of the transport blocks in the current HARQ feedback window.

In an embodiment, when the HARQ feedback of the second transport block received in advance is successfully received, the second indication information has a first indication value, and the first indication value is used for indicating the terminal to send the HARQ feedback of the first transport block; when the previously received HARQ feedback of the second transport block fails to be received, the second indication information has a second indication value, and the second indication value is used for indicating the terminal to send the HARQ feedback of the first transport block and the second transport block.

Here, the HARQ feedback of the previously received second transport block may be HARQ feedback of the second transport block received within one HARQ feedback window or a plurality of HARQ feedback windows before the current HARQ feedback window, for example, HARQ feedback of the second transport block received within the N-1 th HARQ feedback window or the N-1, N-2, and N-3 th HARQ feedback windows. Here, the successful reception of the HARQ feedback of the second transport block may refer to reception of the HARQ feedback within a first time period after the base station transmits the second transport block. The HARQ feedback reception failure of the second transport block may refer to that HARQ feedback is not received within a first time period after the base station transmits the second transport block. Here, when the HARQ feedback of the second transport block received in advance is successfully received, a first indication value of the second indication information may be set to 01, where the first indication value is used to indicate the terminal to transmit the HARQ feedback of the first transport block; when the previously received HARQ feedback of the second transport block fails to be received, a first indication value of second indication information may be set to 10, where the second indication value is used to indicate the terminal to transmit HARQ feedback of the first transport block and the second transport block.

In an embodiment, the value information determined by the number of bits occupied by the second indication information is used for indicating that the terminal determines the number of the second transport blocks performing HARQ feedback when sending the HARQ feedback of the first transport block and the HARQ feedback of the second transport block.

Here, taking 2 bits occupied by the second indication information as an example, and the values that can be represented by the 2 bits may be 01, 10, and 11, respectively, then when the value can be set to be 01, it is determined that the number of the second transport blocks performing HARQ feedback corresponds to 0, that is, only the HARQ feedback of the current first transport block is sent during HARQ feedback; when the value is set to be 10, determining that the number of the second transport blocks for performing HARQ feedback corresponds to 1, that is, the HARQ feedback of the first transport block and the HARQ feedback of a transport block before the first transport block are sent during HARQ feedback; when the set value is 11, it is determined that the number of the second transport blocks performing HARQ feedback corresponds to 2, that is, HARQ feedback of the first transport block and two consecutive transport blocks before the first transport block is sent during HARQ feedback. Here, it should be noted that the second indication information may occupy any set number of bits, and is used to represent HARQ feedback of the first transport block and consecutive transport blocks before the first transport block when HARQ feedback is sent, where the HARQ feedback is, for example, 3 bits or 4 bits.

In an embodiment, the downlink control information includes third indication information, and the method further includes: and setting the third indication information as a counting mode among HARQ feedback windows, wherein when HARQ feedback of the second transmission block received in advance is failed to be received, the counting mode among the HARQ feedback windows is a continuous counting mode, and the third indication information is used for indicating that the number of downlink transmission blocks received by the terminal is in the HARQ feedback windows on the current sub-frame and the sub-frame before the current sub-frame and on the current sub-carrier and the sub-carrier before the current sub-carrier.

Here, the third indication information may be understood as indicating how many downlink data may be received for the terminal within the current HARQ feedback window up to the current subframe and the current subcarrier.

Here, on subcarriers preceding the current subframe and the current subcarrier may refer to subcarriers preceding the current subframe and having a lower frequency preceding the current subcarrier and the current subcarrier. Here, the terminal can determine, based on the third indication information, that the number of downlink transport blocks can be received in the HARQ feedback window on the current subframe and a subframe before the current subframe and on the current subcarrier and a subcarrier before the current subcarrier, so as to further determine the reception condition of the transport blocks. For example, in the current HARQ window, the field setting value included in the third indication information corresponding to the fourth transport block 4 is 4, and the terminal may know that 3 transport blocks are sent before the fourth transport block in the current HARQ window after receiving the third indication information.

Here, when the reception of the HARQ feedback of the second transport block received earlier fails, the counting mode between the HARQ feedback windows is the continuous counting mode, which can facilitate the terminal to determine the transmission condition of the second transport block when the first transport block and the second transport block are fed back together. For example, the first transport block corresponds to a current HARQ feedback window, the second transport block corresponds to a HARQ feedback window before the current HARQ feedback window, and when the HARQ feedback reception of the second transport block fails, the number of downlink transport blocks that should be fed back currently can be determined by continuously counting between the two HARQ feedback windows.

As shown in fig. 9, another embodiment of the present disclosure provides a method for HARQ feedback enhancement, the method including:

step S210: receiving downlink control information containing first indication information;

step S220: and determining the number of the received downlink transmission blocks on the subframe after the current subframe and the subcarrier after the current subcarrier in the current HARQ feedback window according to the first indication information.

Here, the data receiving end determines whether to correctly receive data when data transmission is performed based on hybrid automatic repeat request HARQ feedback of a transport block. When the data is correctly received, feeding back ACK; when the data is not correctly received, NACK is fed back. Here, the ACK/NACK is transmitted on a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH). Here, in the time division duplex system, a downlink shared physical channel transmitting a plurality of downlink subframes may feed back ACK or NACK through the same uplink subframe. All downlink subframes corresponding to the same uplink subframe form a set K, and all downlink subframes in the set K are collectively referred to as an HARQ feedback window. The terminal may determine whether each downlink transport block sent by the base station is lost according to the number of downlink transport blocks that need to be received and according to the information of the downlink transport blocks that have been actually received, for example, the base station sends 6 transport blocks, which are transport block 1, transport block 2, transport block 3, transport block 4, transport block 5, and transport block 6. The field values included by the corresponding first indication information are 5, 4, 3, 2, 1 and 0 respectively, and the transport block 2 and the transport block 5 are lost in the transmission process, so that the terminal determines that the transport block 2 and the transport block 5 are lost according to the information of the transport block 1, the transport block 3, the transport block 4 and the transport block 6 actually and sequentially received by the terminal and by combining the field values corresponding to the first indication information corresponding to the transport block 1, the transport block 3, the transport block 4 and the transport block 6. And feeding back the receiving and losing results of the downlink transmission block to the base station in a HARQ feedback mode so that the base station can determine whether to send the downlink transmission block to the terminal again or send a new downlink transmission block to the terminal.

In an embodiment, the downlink control information further includes second indication information; in step S210, according to the second indication information, sending HARQ feedback of the first transport block and/or HARQ feedback of the second transport block; wherein the first transport block is a transport block decoded by a first codebook currently used; the second transport block is a transport block decoded by a second codebook used before the first codebook.

Here, the codebook corresponds to the HARQ feedback window. For example, the second transport block includes transport block 1, transport block 2, and transport block 3 within a second HARQ feedback window, where the second HARQ feedback window corresponds to a second codebook through which transport block 1, transport block 2, and transport block 3 are decoded, respectively. Within the first HARQ feedback window, the first transport block includes transport block 3, transport block 4, and transport block 5, where the first HARQ feedback window corresponds to a first codebook through which transport block 3, transport block 4, and transport block 5 are decoded, respectively. If the HARQ feedback corresponding to the transport block 1, the transport block 2, and the transport block 3 included in the second transport block is AAN, where the AAN is used to characterize that the HARQ feedback contents corresponding to the transport block 1, the transport block 2, and the transport block 3 are ACK, and NACK, respectively, that is, the transport block 1 and the transport block 2 are successfully transmitted, and the transport block 3 is lost. If the HARQ feedback corresponding to the transport block 3, the transport block 4, and the transport block 5 included in the first transport block is AAA, where the AAA is used to characterize that the HARQ feedback contents corresponding to the transport block 1, the transport block 2, and the transport block 3 are ACK, and ACK, respectively, that is, the transport block 1, the transport block 2, and the transport block 3 are all successfully sent. When the second indication information indicates that the terminal sends the HARQ feedback of the first transport block and the HARQ feedback of the second transport block, the corresponding HARQ feedback content is AANAAA.

Here, when the second indication information has the first indication value, the terminal transmits HARQ feedback of the first transport block; and when the second indication information has a second indication value, the terminal sends the HARQ feedback of the first transport block and the HARQ feedback of the second transport block.

In an embodiment, according to the numerical information determined by the number of bits occupied by the second indication information, when the HARQ feedback of the first transport block and the HARQ feedback of the second transport block are sent, the number of the second transport blocks performing HARQ feedback is determined. .

Here, taking 2 bits occupied by the second indication information as an example, and the values that can be represented by the 2 bits may be 01, 10, and 11, respectively, then when the value can be set to be 01, it is determined that the number of the second transport blocks performing HARQ feedback corresponds to 0, that is, only the HARQ feedback of the current first transport block is sent during HARQ feedback; when the value is set to be 10, determining that the number of the second transport blocks for performing HARQ feedback corresponds to 1, that is, the HARQ feedback of the first transport block and the HARQ feedback of a transport block before the first transport block are sent during HARQ feedback; when the set value is 11, it is determined that the number of the second transport blocks performing HARQ feedback corresponds to 2, that is, HARQ feedback of the first transport block and two consecutive transport blocks before the first transport block is sent during HARQ feedback. Here, it should be noted that the second indication information may occupy any set number of bits, and is used to represent HARQ feedback of the first transport block and consecutive transport blocks before the first transport block when HARQ feedback is sent, for example, 2 bits, 3 bits, and the like.

In an embodiment, the downlink control information further includes third indication information, and the method further includes: when the second indication information indicates that the HARQ feedback of the first transmission block and the HARQ feedback of the second transmission block are sent, determining that the third indication information is a continuous counting mode between HARQ feedback windows; the third indication information is used for indicating that the terminal receives the number of downlink transmission blocks in a continuous HARQ feedback window on a current subframe and a subframe before the current subframe and a subcarrier before the current subcarrier; and determining the feedback content of the HARQ feedback according to the first indication information and the third indication information.

Here, on a carrier that is prior to the current subframe and a subframe prior to the current subframe and the current subcarrier may refer to on a subcarrier that is less frequent prior to the current subframe and a subframe prior to the current subframe and the current subcarrier. Here, the terminal can determine, based on the third indication information, that the number of downlink transport blocks can be received in the HARQ feedback window on the current subframe and a subframe before the current subframe and on the current subcarrier and a subcarrier before the current subcarrier, so as to further determine the reception condition of the transport blocks. For example, in the current HARQ window, the field setting value included in the third indication information corresponding to the fourth transport block 4 is 4, and the terminal may know that 3 transport blocks are sent before the fourth transport block in the current HARQ window after receiving the third indication information.

Here, when the second indication information indicates that the HARQ feedback of the first transport block and the HARQ feedback of the second transport block are transmitted, the counting mode between HARQ feedback windows is a continuous counting mode, which can facilitate the terminal to determine the transmission condition of the second transport block when the first transport block and the second transport block are fed back together. For example, the first transport block corresponds to a current HARQ feedback window, the second transport block corresponds to a HARQ feedback window before the current HARQ feedback window, when HARQ feedback of the second transport block fails, and when the second indication information indicates that HARQ feedback of the first transport block and HARQ feedback of the second transport block are sent, continuous counting is performed between the two HARQ feedback windows, and then the number of downlink transport blocks that should be fed back currently can be determined.

Here, the feedback content of the HARQ feedback is determined according to the first indication information and the third indication information. For example, the third indication information includes a field value of 6, that is, the base station transmits 6 transport blocks, transport block 1, transport block 2, transport block 3, transport block 4, transport block 5, and transport block 6. The corresponding first indication information includes field values of 5, 4, 3, 2, 1, and 0, respectively, and transport block 2 and transport block 5 are lost during transmission. The terminal determines that the transmission block 2 and the transmission block 5 are lost according to the information of the transmission block 1, the transmission block 3, the transmission block 4 and the transmission block 6 actually and sequentially received by the terminal and by combining the field value corresponding to the first indication information and the field value corresponding to the third indication information corresponding to the transmission block 1, the transmission block 3, the transmission block 4 and the transmission block 6. And feeds back the receiving and losing results of the downlink transmission block to the base station in a HARQ feedback mode,

further, the present disclosure also provides 1 specific embodiment to further understand the method for HARQ feedback enhancement provided by the embodiments of the present disclosure.

Example 1:

referring to fig. 10, since a part of downlink transport blocks of codebook 2 is lost (transport block 5 is lost) and HARQ feedback thereof fails (corresponding to ±) and the base station sets a Trigger Indication TI (TI, Trigger Indication) of second Indication information of codebook 3 to 2, the terminal is triggered to feed back the data receiving condition of codebook 2 together with codebook 3, when the terminal receives codebook 3 issued by the base station, the terminal knows that HARQ feedback of codebook 2 fails according to TI ═ 2 and transmits HARQ feedback of codebooks 2 and 3 together in feedback resources indicated by codebook 3, and the terminal is indicated according to C-DAI and AC-DAI to determine that HARQ feedback content corresponding to codebooks 2 and 3 is AANAA. Here, the AC-DAI may be understood as indicating how many downlink data are needed to be received on the following subframe and all following subcarriers until the current subframe and the current subcarrier in the current HARQ feedback window, and the user determines a or N corresponding to the following downlink data according to the receiving condition of the user.

The present example can reduce the occurrence of ambiguity of HARQ feedback between the base station and the terminal in a scenario where a previous HARQ codebook retransmission is triggered in the middle of the current HARQ codebook. Referring to fig. 11a, 11b and 11c, since the feedback of UL1 fails, the base station sets TI of codebook 2 to trigger the user to feed back the data reception condition of codebook 1 together with codebook 2, although this scheme triggers the same retransmission indication in the three scenarios corresponding to fig. 11a, 11b and 11c, since the terminal has different understanding for each codebook, no error occurs, for example: in fig. 11a, when a terminal receives a downlink transport block 1 of a codebook 1, it determines that there are 2 downlink transport blocks to be received in the current codebook according to an AC-DAI indication, and when the reception fails, the terminal determines that HARQ content required to be fed back by the codebook 1 is an ANN; when the base station starts to send the downlink transmission block 4 of the codebook 2, because the feedback failure of the codebook 1 is not detected yet, the HARQ feedback is not triggered at this time; the user knows that two downlink transmission blocks need to be received subsequently according to the AC-DAI indication in the downlink transmission block 4, when the base station detects that the HARQ feedback of the codebook 1 fails, the trigger indication TI in the downlink transmission block 5 and the downlink transmission block 6 is set to 2 to trigger the user to feed back the codebooks 1 and 2 together, the terminal judges the HARQ content corresponding to the codebook 2 to be AAA according to the receiving condition of the downlink transmission block in the codebook 2, and feeds back the HARQ feedback contents ANNAAA of the codebooks 1 and 2 to the base station on UL 2.

Similarly, in 11b and 11c, the terminal feeds back ananaaa and AANNAA to the base station on UL2, so that the situation that the terminal feeds back HARQ erroneously is avoided, and the problem that the HARQ feedback codebook is not clear between the base station and the user is reduced.

An embodiment of the present disclosure provides an apparatus for HARQ feedback enhancement, where the apparatus includes a sending module, where the sending module is configured to send downlink control information including first indication information to a terminal; the first indication information is used for indicating the number of downlink transport blocks received by the terminal in a subframe after the current subframe and a subcarrier after the current subcarrier in a current HARQ feedback window.

In an embodiment, the sending module is further configured to configure the downlink control information to further include second indication information; the second indication information is used for indicating the terminal to send the HARQ feedback of the first transport block and/or the HARQ feedback of the second transport block; wherein the first transport block is a transport block decoded by a first codebook currently used; the second transport block is a transport block decoded by a second codebook used before the first codebook.

In an embodiment, the sending module is further configured to, when the HARQ feedback of the previously received second transport block is successfully received, the second indication information has a first indication value, and the first indication value is used for indicating the terminal to send the HARQ feedback of the first transport block; when the previously received HARQ feedback of the second transport block fails to be received, the second indication information has a second indication value, and the second indication value is used for indicating the terminal to send the HARQ feedback of the first transport block and the second transport block.

In an embodiment, the sending module is further configured to determine numerical information determined by the number of bits occupied by the second indication information, where the numerical information is used to indicate that the terminal determines the number of the second transport blocks performing HARQ feedback when sending the HARQ feedback of the first transport block and the HARQ feedback of the second transport block.

In an embodiment, the downlink control information includes third indication information, and the sending module is further configured to

And setting the third indication information as a counting mode among HARQ feedback windows, wherein when the HARQ feedback of the second transmission block received in advance fails to be received, the counting mode among the HARQ feedback windows is a continuous counting mode, and the third indication information is used for indicating that the number of the downlink transmission blocks received by the terminal is in the HARQ feedback windows on the current sub-frame and the sub-frame before the current sub-frame and on the current sub-carrier and the sub-carrier before the current sub-carrier.

Another embodiment of the present disclosure provides an apparatus for HARQ feedback enhancement, where the apparatus includes a receiving module configured to receive downlink control information including first indication information; and determining the number of the received downlink transmission blocks in a subframe after the current subframe and a subcarrier after the current subcarrier in a current hybrid automatic repeat request (HARQ) feedback window according to the first indication information.

In an embodiment, the receiving module is further configured to determine, according to numerical information determined by the number of bits occupied by the second indication information, the number of the second transport blocks performing HARQ feedback when the HARQ feedback of the first transport block and the HARQ feedback of the second transport block are sent.

In an embodiment, the downlink control information further includes third indication information, and the receiving module is further configured to determine that the third indication information is a continuous counting mode between HARQ feedback windows when the second indication information indicates to send HARQ feedback of the first transport block and HARQ feedback of the second transport block; the third indication information is used for indicating that the terminal receives the number of downlink transmission blocks in a continuous HARQ feedback window on a current subframe and a subframe before the current subframe and a subcarrier before the current subcarrier; the receiving module is further configured to determine the feedback content of the HARQ feedback according to the first indication information and the third indication information.

An embodiment of the present disclosure further provides a communication device, including:

an antenna;

a memory;

and the processor is respectively connected with the antenna and the memory, and is used for controlling the antenna to transmit and receive wireless signals by executing the executable program stored in the memory, and can execute the steps of the contention window determination method provided by any of the foregoing embodiments.

The communication device provided in this embodiment may be the aforementioned terminal or base station. The terminal can be various human-borne terminals or vehicle-borne terminals. The base stations may be various types of base stations, such as 4G base stations or 5G base stations, and so on.

The antenna may be various types of antennas, for example, a mobile antenna such as a 3G antenna, a 4G antenna, or a 5G antenna; the antenna may further include: a WiFi antenna or a wireless charging antenna, etc.

The memory may include various types of storage media, which are non-transitory computer storage media capable of continuing to remember the information stored thereon after a communication device has been powered down.

The processor may be connected to the antenna and the memory via a bus or the like for reading an executable program stored on the memory, e.g. at least one of the methods shown in fig. 8 and 9.

The embodiments of the present disclosure also provide a non-transitory computer readable storage medium, which stores an executable program, where the executable program, when executed by a processor, implements the steps of the method for determining a contention window provided in any of the foregoing embodiments, for example, at least one of the methods shown in fig. 8 and 9.

As shown in fig. 12, an embodiment of the present disclosure provides a structure of a terminal.

Referring to the terminal 800 shown in fig. 12, the present embodiment provides a terminal 800, which may be specifically a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, and the like.

Referring to fig. 12, terminal 800 may include one or more of the following components: a processing component 802, a memory 804, a power supply component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, and a communication component 816.

The processing component 802 generally controls overall operation of the terminal 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.

The memory 804 is configured to store various types of data to support operation at the device 800. Examples of such data include instructions for any application or method operating on terminal 800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

Power components 806 provide power to the various components of terminal 800. Power components 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for terminal 800.

The multimedia component 808 includes a screen that provides an output interface between the terminal 800 and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front-facing camera and/or the rear-facing camera may receive external multimedia data when the device 800 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the terminal 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, the audio component 810 also includes a speaker for outputting audio signals.

The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

Sensor assembly 814 includes one or more sensors for providing various aspects of state assessment for terminal 800. For example, sensor assembly 814 can detect an open/closed state of device 800, relative positioning of components, such as a display and keypad of terminal 800, position change of terminal 800 or one component of terminal 800, presence or absence of user contact with terminal 800, orientation or acceleration/deceleration of terminal 800, and temperature change of terminal 800. The sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

Communication component 816 is configured to facilitate communications between terminal 800 and other devices in a wired or wireless manner. The terminal 800 may access a wireless network based on a communication standard, such as Wi-Fi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, communications component 816 further includes a Near Field Communications (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the terminal 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.

In an exemplary embodiment, a non-transitory computer readable storage medium including instructions, such as the memory 804 including instructions, executable by the processor 820 of the terminal 800 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

The terminal may be configured to implement the foregoing capability parameter processing method, for example, the method of HARQ feedback enhancement as shown in fig. 8 and fig. 9.

As shown in fig. 13, an embodiment of the present disclosure provides a structure of a base station. For example, the base station 900 may be provided as a network side device. Referring to fig. 13, base station 900 includes a processing component 922, which further includes one or more processors and memory resources, represented by memory 932, for storing instructions, such as applications, that are executable by processing component 922. The application programs stored in memory 932 may include one or more modules that each correspond to a set of instructions. Further, processing component 922 is configured to execute instructions to perform the random access method provided by any of the foregoing embodiments of the above-described methods, for example, the method of HARQ feedback enhancement as shown in fig. 8 and 9.

The base station 900 may also include a power supply component 926 configured to perform power management of the base station 900, a wired or wireless network interface 950 configured to connect the base station 900 to a network, and an input/output (I/O) interface 958. The base station 900 may operate based on an operating system stored in memory 932, such as Windows Server, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, or the like.

The wireless network interface 950 includes, but is not limited to, the antenna of the aforementioned communication device. Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice in the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

1. A method of HARQ feedback enhancement, wherein the method comprises:

sending downlink control information containing first indication information to a terminal under an NR-U scene based on a new air interface; the first indication information is used for indicating the number of downlink transport blocks received by the terminal in a subframe after a current subframe and a subcarrier after the current subcarrier in a current HARQ feedback window.

2. The method of claim 1, wherein the method further comprises:

3. The method of claim 2, wherein the method further comprises:

4. The method of claim 2, wherein the method further comprises:

5. The method of claim 1, wherein the downlink control information includes third indication information, the method further comprising:

and setting the third indication information as a counting mode among HARQ feedback windows, wherein when HARQ feedback of a second transmission block received in advance fails to be received, the counting mode among the HARQ feedback windows is a continuous counting mode, the third indication information is used for indicating that the number of downlink transmission blocks received by the terminal is in the HARQ feedback windows on a subframe before the current subframe and on a subcarrier before the current subcarrier and the current subcarrier.

6. A method of HARQ feedback enhancement, wherein the method comprises:

receiving downlink control information containing first indication information in an NR-U scene based on a new air interface;

7. The method of claim 6, wherein the downlink control information further includes second indication information, the method further comprising:

8. The method of claim 7, wherein the method further comprises:

and determining the number of the second transport blocks for HARQ feedback when sending the HARQ feedback of the first transport block and the HARQ feedback of the second transport block according to the numerical information determined by the bit number occupied by the second indication information.

9. The method of claim 7, wherein the downlink control information further includes third indication information, the method further comprising: when the second indication information indicates that HARQ feedback of a first transmission block and HARQ feedback of a second transmission block are sent, determining that the third indication information is a continuous counting mode between HARQ feedback windows; the third indication information is used for indicating that the terminal receives the number of downlink transmission blocks in a continuous HARQ feedback window on a current subframe and a subframe before the current subframe and a subcarrier before the current subcarrier;

and determining the feedback content of HARQ feedback according to the first indication information and the third indication information.

10. An apparatus for enhancing HARQ feedback, wherein the apparatus includes a sending module, and the sending module is configured to send downlink control information including first indication information to a terminal in an NR-U scenario based on a new air interface; the first indication information is used for indicating the number of downlink transport blocks received by the terminal in a subframe after a current subframe and a subcarrier after the current subcarrier in a current HARQ feedback window.

11. The apparatus of claim 10, wherein the sending module is further configured to send the downlink control information further including second indication information; the second indication information is used for indicating the terminal to send the HARQ feedback of the first transport block and/or the HARQ feedback of the second transport block; wherein the first transport block is a transport block decoded by a first codebook currently used; the second transport block is a transport block decoded by a second codebook used before the first codebook.

12. The apparatus of claim 11, wherein the transmitting module is further configured to, when the previously received HARQ feedback of the second transport block is successfully received, the second indication information has a first indication value for indicating the terminal to transmit the HARQ feedback of the first transport block; when the previously received HARQ feedback of the second transport block fails to be received, the second indication information has a second indication value, and the second indication value is used for indicating the terminal to send the HARQ feedback of the first transport block and the second transport block.

13. The apparatus according to claim 11, wherein the sending module is further configured to use numerical information determined by a number of bits occupied by the second indication information to indicate that the terminal determines the number of the second transport blocks for HARQ feedback when sending HARQ feedback of the first transport block and HARQ feedback of the second transport block.

14. The apparatus of claim 10, wherein the downlink control information includes third indication information, and the transmission module is further configured to set the third indication information to a counting mode between HARQ feedback windows, wherein the counting mode between HARQ feedback windows is a continuous counting mode when HARQ feedback of the second transport block received earlier fails to be received, and the third indication information is used to indicate that the terminal receives the number of downlink transport blocks within the HARQ feedback window on a subframe before the current subframe and the current subcarrier and the subcarrier before the current subframe.

15. An apparatus for HARQ feedback enhancement, wherein the apparatus includes a receiving module configured to receive downlink control information including first indication information in an NR-U scenario based on a new air interface; and determining the number of the received downlink transmission blocks in the current HARQ feedback window and on the sub-frame and the sub-carrier after the current sub-frame according to the first indication information.

16. The apparatus according to claim 15, wherein the downlink control information further includes second indication information, and the receiving module is further configured to send HARQ feedback of the first transport block and/or HARQ feedback of the second transport block according to the second indication information; wherein the first transport block is a transport block decoded by a first codebook currently used; the second transport block is a transport block decoded by a second codebook used before the first codebook.

17. The apparatus according to claim 16, wherein the receiving module is further configured to determine, according to numerical information determined by a number of bits occupied by the second indication information, a number of the second transport blocks for HARQ feedback when transmitting HARQ feedback of the first transport block and HARQ feedback of the second transport block.

18. The apparatus of claim 16, wherein the downlink control information further includes third indication information, and the receiving module is further configured to determine that the third indication information is a continuous counting mode between HARQ feedback windows when the second indication information indicates that HARQ feedback of a first transport block and HARQ feedback of a second transport block are transmitted; the third indication information is used for indicating that the terminal receives the number of downlink transmission blocks in a continuous HARQ feedback window on a current subframe and a subframe before the current subframe and a subcarrier before the current subcarrier; and determining the feedback content of HARQ feedback according to the first indication information and the third indication information.

19. A communication device, comprising:

an antenna;

a memory;

a processor, respectively connected to the antenna and the memory, for controlling the antenna to transmit and receive wireless signals by executing an executable program stored in the memory, and being capable of performing the steps of the method for HARQ feedback enhancement according to any of claims 1 to 5, or 6 to 9.

20. A non-transitory computer readable storage medium storing an executable program, wherein the executable program when executed by a processor implements the steps of the method of HARQ feedback enhancement as claimed in any one of claims 1 to 5, or 6 to 9.